Edmund Urbani wrote: > John Cherouvim wrote: >> Hello >> >> I'm building a mid scale web application for use within an intranet. I'm >> using a custom web framework to handle flow, user input, validations, >> persistence with hibernate and views with JSP and JSP 2.0 tag files. I >> use tomcat 5.0.28 and in particular this feature it has where you can >> write you own tag files in the WEB-INF/tags folder, and tomcat will >> compile them and make them available in the JSPs. >> >> I like this feature because it provides me encapsulation. I can call any >> tag I like with parameters and in addition I also use JSTL and EL which >> allows me to do anything I would ever want on the presentation side of >> the application. >> >> I've used jsp tag files before, in a much smaller application where I >> had something like 10 tags. >> Right now I am 50% done with this application and I already have 120 tag >> files to render pojos, fields, various html controls etc. Most tags call >> other tags in order to generate the whole page. >> The first (small) problem is that every time I change something on a >> tag, particularly in fine grained tags (which are heavily being used >> from other tags) then tomcat has to recompile everything. It takes >> around 1.5 minutes to do that on my workstation. >> >> The second (big) problem, is when I try to deploy on the client's web >> server (intel xeon with 4 cpus with tomcat 5.0.28). I deploy and tomcat >> starts up in something like 9 seconds. Then I access the application for >> the first time, using a browser, and it takes more than an hour to build >> the work\Catalina\localhost\MY-APPLICATION\org\apache\jsp folder. >> Looking at the generated sources of those tag files it seems to me that >> its taking so much because tomcat has to calculate all the dependencies >> between tags. As soon as everything has compiled, the application runs >> smothly as expected. There are 118 tag files, and the >> work\Catalina\localhost\MY-APPLICATION\org\apache\jsp folder ends up >> with 238 files (one for .java and one for .class) and takes up 2.7mb. I >> don't know why such a fast machine needs so much time to generate 1.47mb >> of source code, and compile it. >> >> This situation is really bad for me and I'd like to know what can I do >> to improve the situation. >> 1. Would tomcat 5.5.17 improve anything on this issue? >> 2. Would precompiling the JSPs and tags improve anything? >> 3. Can I upload my work\Catalina\localhost\MY-APPLICATION folder to the >> client's server and force that tomcat not to re-compile? I tried it and >> it did start compiling the jsps/tags again. >> 4. Would changing some tags from tag files to proper Java >> javax.servlet.jsp.tagext.Tag classes improve anything? >> 5. If I package my tag files into a jar, would then tomcat had to do the >> work thing? >> 6. Should I change to another templating engine, such as Velocity? >> >> thanks, >> Ioannis >> > 1-5 all sound like good ideas to try to me. 6 seems like a last resort > kind of choice. > > i can't really provide you with a satisfying answer here since I don't > know tomcat/jasper internals that well myself. and so far i never had to > deal with that many custom tags. > > however i would like to suggest you do some java profiling. that should > reveal which method(s) use up all the cpu time and may provide a hint to > the source of the problem. > > Edmund >
Taken from http://tomcat.apache.org/tomcat-5.5-doc/jasper-howto.html: ... Tomcat 5.5 uses the Jasper 2 JSP Engine to implement the JavaServer Pages 2.0 specification. Jasper 2 has been redesigned to significantly improve performance over the orignal Jasper. ... Looks like option 1 should solve your problem. Please let us know, whether it actually does. You might also want to check the above URL for some (minor) performance improvements for production environments. Edmund --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
